M4.5 earthquake 133 km W of Hihifo, Tonga
A magnitude 4.5 earthquake struck 133 km W of Hihifo, Tonga on Mon, Sep 15, 1986, 6:01 PM GMT-12 (06:01 UTC), 190 km (118 mi) below the surface.
A larger quake followed: M4.8 123 km W of Hihifo, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1986-09-16 06:01:07 UTC
- Depth
- 190.0 km (118.1 mi), intermediate-depth
- Epicenter
- 16.013° S, 175.044° W
- Region
- Tonga
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Depth from
- FROM_LOCATION
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002y4m. Read Thu, Oct 1, 2026, 7:03 AM UTC.